In this paper, the history, current status, and research approaches to nitrogen pollution were reviewed using systems analysis and deductions. The seriousness of N pollution world-wide was highlighted and recommendati...In this paper, the history, current status, and research approaches to nitrogen pollution were reviewed using systems analysis and deductions. The seriousness of N pollution world-wide was highlighted and recommendations were made to address the situation. A new hypothesis based on phytoremediation, which means the use of plants to directly or indirectly degrade or remove contaminats from soil and water, was proposed.展开更多
金属氧化物避雷器(MOA)在污秽条件下的内部温升及其热稳定性是研究避雷器耐污能力的重要方面。为此,以GB 11032—2010附录O中的污秽试验方法为基础,同时参考IEEE Std C 62.11—1999,试验比较了不同盐密、不同支架高度等情况下进行人工...金属氧化物避雷器(MOA)在污秽条件下的内部温升及其热稳定性是研究避雷器耐污能力的重要方面。为此,以GB 11032—2010附录O中的污秽试验方法为基础,同时参考IEEE Std C 62.11—1999,试验比较了不同盐密、不同支架高度等情况下进行人工污秽试验时避雷器的内部温升情况,同时还比较了复合外套及瓷外套避雷器的耐污能力及雾湿润条件对避雷器耐污能力的影响等。试验结果表明,仅监测底部阻性电流不能准确反映避雷器的内部热稳定性;考虑雾湿润进行污秽试验时内部温升较高且分散性小。最后提出了一个改进的污秽试验方法,主要增加了雾湿润条件和实时监测内部温度两个条件。展开更多
基金supported by the National Key Technology R&D Program of China (2006BAD02A15&2007BAD89B01)
文摘In this paper, the history, current status, and research approaches to nitrogen pollution were reviewed using systems analysis and deductions. The seriousness of N pollution world-wide was highlighted and recommendations were made to address the situation. A new hypothesis based on phytoremediation, which means the use of plants to directly or indirectly degrade or remove contaminats from soil and water, was proposed.
文摘金属氧化物避雷器(MOA)在污秽条件下的内部温升及其热稳定性是研究避雷器耐污能力的重要方面。为此,以GB 11032—2010附录O中的污秽试验方法为基础,同时参考IEEE Std C 62.11—1999,试验比较了不同盐密、不同支架高度等情况下进行人工污秽试验时避雷器的内部温升情况,同时还比较了复合外套及瓷外套避雷器的耐污能力及雾湿润条件对避雷器耐污能力的影响等。试验结果表明,仅监测底部阻性电流不能准确反映避雷器的内部热稳定性;考虑雾湿润进行污秽试验时内部温升较高且分散性小。最后提出了一个改进的污秽试验方法,主要增加了雾湿润条件和实时监测内部温度两个条件。
